Copper Flare Seal BonnetResist mechanical pull-out and are suitable for use with thin-wall tubing. Material and working pressure of tubing must be determined before using in a specific application. Suitable for use in refrigeration equipment, air compressors, and machinery. Can be used with flareable copper, brass, aluminum, and welded steel hydraulic tubing.UL Listed for flammable liquids. Meet SAE J512 and J513 standards. Low-Lead fittings are certified for use in potable water applications.Temp. range: -65 to 250 F